You can divide it with a single touch.
Great for speeding up your calculation.
Hard case included.
Birch Ball
Birch: Tree Type Fine and solid wood
Hippo balls are brown balls and are most commonly used. Suitable for beginner to advanced use.
Abacus Features:
Learning abacus is said to improve not only calculated skills, but also concentration and patience.
The ball material is carefully selected, and carefully adjusted to withstand a long time, so it can be used with confidence regardless of the beginner or advanced level.